package com.ks.utils.image;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

/**
 * 
 * @author pks
 * @version 2019年5月29日 
 */
public class SutilVcodeImage {

	private static ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");
	private static String[] ysf = new String[]{"+","-"};
	
	public static String vcode_num(String path){
		int width = 70;
		int height = 30;
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics g = image.getGraphics();
		Random random = new Random();
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		g.setFont(new Font("Times New Roman",Font.PLAIN,18));
		g.setColor(getRandColor(160, 200));
		for(int i=0;i<100;i++){
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int x1 = random.nextInt(12);
			int y1 = random.nextInt(12);
			g.drawLine(x, y, x+x1, y+y1);
		}
		String sRand = "";
		for(int i=0;i<4;i++){
			String rand = String.valueOf(random.nextInt(10));
			sRand += rand;
			g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
			g.drawString(rand, 13*i+6, 20);
		}
		g.dispose();
		try {
			ImageIO.write(image, "JPEG", new FileOutputStream(path));
			return sRand;
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public static String vcode_formula(String path){
		int width = 70;
		int height = 30;
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics g = image.getGraphics();
		Random random = new Random();
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		g.setFont(new Font("Times New Roman",Font.PLAIN,18));
		g.setColor(getRandColor(160, 200));
		for(int i=0;i<100;i++){
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int x1 = random.nextInt(12);
			int y1 = random.nextInt(12);
			g.drawLine(x, y, x+x1, y+y1);
		}
		String str = "" + random.nextInt(100) + ysf[random.nextInt(2)] + random.nextInt(100); 
		String[] temp = str.split("");
		for(int i=0;i<temp.length;i++){
			String rand = temp[i];
			g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));
			g.drawString(rand, 13*i-6, 20);
		}
		try {
			DecimalFormat df = new DecimalFormat("#");
			Object s = jse.eval(str);
			g.dispose();
			ImageIO.write(image, "JPEG", new FileOutputStream(path));
			return df.format(s);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	private static Color getRandColor(int fc,int bc){
		Random random = new Random();
		if(fc>255){
			fc = 255;
		}
		if(bc < 255){
			bc = 255;
		}
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}
	
	public static void main(String[] args) throws Exception {
		System.out.println(vcode_num("F:/test.jpg"));
	}
}
